Properties of the Number 66080

Sixty-Six Thousand Eighty

Basics

Value: 66079 → 66080 → 66081

Parity: even

Prime: No

Previous Prime: 66071

Next Prime: 66083

Digit Sum: 20

Digital Root: 2

Palindrome: No

Factorization: 2 ⁵ × 5 × 7 × 59

Divisors: 1, 2, 4, 5, 7, 8, 10, 14, 16, 20

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10000001000100000

Octal: 201040

Duodecimal: 322A8

Hexadecimal: 10220

Square: 4366566400

Square Root: 257.06030420895405

Classification

Fibonacci: No

Bell Number: No

Factorial Number: No

Regular Number: No

Perfect Number: No

Special

Kaprekar Constant: No

Munchausen Constant: No

Armstrong Number: No

Kaprekar Number: No

Catalan Number: No

Vampire Number: No

Taxicab Number: No

Super Prime: No

Friedman Number: No

Fermat Number: No

Cullen Number: No

OEIS Sequences

Number of partitions of n into parts not a multiple of 7. Also number of partitions with at most 6 parts of size 1 and differences between parts at distance 9 are greater than 1. A35985

Measures of entanglement in 3-qbits. A129548

Numbers n for which A019565(n) <= A087207(n) < n. A286612

a(n) = ∑_{k=0..floor(n/3)} binomial(5·n-k+1,n-3·k). A371776

Row sums of triangle A131948. A131949

Indices of rows of triangle A262432 where the maximum term of the row is a new record. A262464

Number of series-reduced rooted trees whose leaves are {1, 1, 2, 2, 3, 3, ..., n, n}. A316977

Largest solution·to φ(x) + 1 = prime(n). A66080